Flat Washer 1)Standard:DIN,ANSI,BS,JIS,GB 2)Size:M3- ... )Material:Steel,Stainless steel 4)Finish:Zinc,Black,Nickel Flat Washer 1)Standard:DIN,ANSI,BS,JIS,GB 2)Size:M3 ... , Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating, Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved ...